Thomas Aquinas defined God down for his argument to being a first mover, or first cause. If he could formulate a proof for that, he could demonstrate that there is some Creator out there worth pursuing. He did it, then Einstein's General Theory of Relativity built on the confirmation that there's an origin, then Edwin Hubble

observed that the universe is expanding, which suggests the universe is indeed expanding from a cataclysmic origin ("Let there be light").

Now, there's still no compelling proof that a first cause is sentient or human-like in any way, but the belief in a creator has survived first contact with observable reality.

Indeed. Sentence should read: "If the vaccine should become available, they believe that vaccinating 80 percent of those aged 18 and below would be 93 percent effective in containing pandemic influenza."